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Segment Reporting (Percentage of Net Sales Represented by Each Product Group) (Details)
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Revenue from External Customer [Line Items]      
Percentage of sales by product group (percent) 100.00%five_PercentageOfSalesVolume 100.00%five_PercentageOfSalesVolume 100.00%five_PercentageOfSalesVolume
Leisure [Member]      
Revenue from External Customer [Line Items]      
Percentage of sales by product group (percent) 51.00%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_LeisureMember		 51.70%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_LeisureMember		 52.60%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_LeisureMember
Fashion and home [Member]      
Revenue from External Customer [Line Items]      
Percentage of sales by product group (percent) 29.30%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_FashionAndHomeMember		 29.30%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_FashionAndHomeMember		 30.30%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_FashionAndHomeMember
Party and snack [Member]      
Revenue from External Customer [Line Items]      
Percentage of sales by product group (percent) 19.70%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_PartyAndSnackMember		 19.00%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_PartyAndSnackMember		 17.10%five_PercentageOfSalesVolume
/ us-gaap_ProductOrServiceAxis
= five_PartyAndSnackMember